Pathogen 1
Bacterium
Official achievements confirm it can complete a Heart run.
Confirmed roster
All 7 Pathogens in Pathogenic
Meet the complete playable roster named in official release information and Steam achievements, including the two-player Diatom and secret lil collector.
Pathogen 2
Helminth
The developer confirmed that defeating the Intestine boss unlocks Helminth.
Pathogen 3
Nanobot
The official launch devlog described a modular shape that starts at 1 HP with Armor-focused survival.
Pathogen 4
Fungal Spore
Official achievements confirm it can complete a Heart run.
Pathogen 5
Amoeba
The June 15 demo update introduced it as a three-slot shape that gains slots through level-up layouts.
Pathogen 6
Diatom
The February 12 demo update introduced it as a local co-op Pathogen controlled in two halves.
Pathogen 7
lil collector
Its name is confirmed by Steam; the unlock condition remains hidden.
Secret Pathogen; official sources hide its unlock requirement.
Diatom was introduced as a two-player Pathogen, with one player controlling each half. Exact starting layouts and upgrade details can change after balance updates.
Compare traits, trade-offs and unlocks →